gistfile1.txt

<?php

// somewhere in config/bootstrap
Dispatcher::config(array('rules' => array(
	'admin' => array(
		'action' => 'admin_{:action}' 
	)
))); 

// app/classes/PostsController.php
class PostsController extends Base {
	
	public function admin_index() {
		//...
	}
	
	public function index() {
		//...
	}
}

// config/routes.php
Router::connect(
	'/admin/{:args}',
	array('admin' => true),
	array('continue' => true)
);

// source: http://www.slideshare.net/nateabele/the-state-of-lithium